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These are strong builds that play on hard critical. Even with the second build, she's still pretty squishy.
I would recommend adding Winged Blade in when playing Anubis, Ymir, Arachne, or other enemy players who can disable you with your slow.
Just throwing it out there: it's key when playing her to get out early and often. Don't give the enemy the chance to take advantage of Izanami's squishiness.